Describe5 marksChallenge
A student investigated the water potential of potato tissue. Cylinders of potato were cut and their mass recorded. Each cylinder was placed in a different concentration of sucrose solution. After 24 hours, each cylinder was removed, blotted dry, and reweighed. The percentage change in mass was calculated. The results are shown in the table below.
| Concentration of sucrose solution / mol dm⁻³ | Percentage change in mass |
|---|---|
| 0.0 | +12.4 |
| 0.1 | +6.8 |
| 0.2 | +2.1 |
| 0.3 | -3.5 |
| 0.4 | -9.7 |
| 0.5 | -15.2 |
Describe how the student could use these results to estimate the water potential of the potato tissue.